Brace for rivet-driving tools



Dec. 19, 1922. 1,439,342.

1. A. TAYLOR.

BRACE FOB RIVET DRIVING TOOLS. man Nov. 8. 91s.

7 Fa w FL q.

X L a 704 i INVENTOR- Patented Desi 19, 1922..

JAMES A. TAYLOR, OF GLEN RIDGE BOROUGH, NEW JERSEY.

BEACH FOR RIVET-IDRIVING TOOLS.

Application filed November 8, 1918. Serial No. 261,703.

To all whom it may concern Be it known that 1, James A. TAYLOR, a citizen of the United States, residing at the borough of Glen Ridge, county of Essex, State of New Jersey, have invented new and useful Improvements in Braces for Rivet- Driving Tools, of which the following is a specification. p

Riveting with automatic tools, as at present conduct-ed, requires great strength and skill and the constant jarring and vibration produce mental and physical fatigue that militates against efficient and continued labor.

The objects of my invention are to provide device which will aid in all the operations of driving rivets by providing a mechanical brace for the rivet driving tool which will relieve the operator of the jar and back pressure of the instrument while in operation and at the same time provide means for freely changing the positionor" the tool while the length of the rivet is-being decreased by the blows from the tool and also for changing the direction of the blow, especially when the rivet has been hammered down to the unshaped head stage and it is desired to flatten and round off the same into its finished form. The interposition of this brace conserves the full force of the blow which is struck upon the rivet solidly and without perceptible yielding of the brace and the tool. The device is of such form that when the samehas been secured to the plates which are to be riveted togethera great number oi rivets may be driven by merely sliding the part that supports and braces the tool itself along a support ba or by adjusting the bar itself without loosening the whole device from the plates.

. To such ends my said invention,in its preferred form consists of a brace bar attached by adjustable plugs to the material tobe riveted, a movable collar mounted on this brace bar provided with a socket into which fits a brace part fastened immovably to the rivetingtool having a convex upper face concentric with the face of the socket, and means for raising this socket and the tool as may be desired. The face ofthe socket and the face of the tool collar are arcs of a circle whose centeris the head of the rivet. Since the socket is in the form of a rim with the top and the bottom open the tool may oscillate in the socket while the hammering end of the same is kept constantly on the rivet head. A second brace bar is provided and is movably attached by a sliding collar and set'screw to the first brace bar to permit the moving of the bars over a field of rivet holes and thus enable the operator to rivet a large number of rivets without removing the entire device from the plates which are to be riveted together. The tool holding collar on the first brace bar is mounted so as to permit of movement back and forth over a field of rivets when the same are in a'line parallel to the first brace bar. The device is secured to. the material to be riveted together by adjustable plugs, all of which are mounted in slots so that the same may be adjusted with considerable latitude in rivet holes that are not in straight lines.

My said invention is fully shown described and claimed in the following specification of which the accompanying drawings form a part; wherein letters or numerals of reference designate like or equivalent parts wherever found throughout the several views and in which:

Figure 1 is a top view of the/entire device, showing the rivet driving tool in position in the brace part which is-mounted on the main brace bar, and both brace bars secured together and placed in their relation to the plate or material to be riveter and the. rivet holes in the same Figure 2 is the top view of the movable collar supporting the rivet driving tool brace and showing in dotted lines the rotating ovoidal shaped cam part for changing the position of the rivet driving tool and its "brace part during the process of driving a rivet.

Figure 3 is a side view in detail of the movable collar supporting the rivet driving tool brace, the rotating ovoidal shaped cam part for changing the position of the rivet driving tool brace, the rivet driving tool in position, the connecting" bar for keeping the ovoidal shaped cam part and the rivet driving tool brace together during a change in position of both and the first brace bar in cross section, all of which are shown in relation to the material to be riveted together and to rivet to be driven,

F igure l is an end view in detailof the movable collar, the'movable ovoidal shaped cam part, the rivet driving tool brace, the rod connectingthe cam part and the tool brace, and showing in dotted lines the position taken by the last three when the cam part is rotated and the tool brace and the to l'are depressed to their lowest point.

Figure is a side view in detail of the rivet driving tool brace with a portion of the brace in cross section along the line 01* of Figure 2.

Figure 6 is a side view of the rivet driving tool provided with an immovable brace part, the upper convex of which is a curve of the same radius as the curve of the face of the socket in the tool brace.

'Figure T is a top view of the rivet driving tool provided with the immovable brace part.

Figure 8 is a side view of the second brace for carrying a movable collarthro'ugh which also passes the first brace bar (shown in cross section), and by means of which collar and the set screw passing through itstop wall the two brace bars are held together.

Figure 9 is a side view in detail of one of the securing plugs placed at the ends of the brace bars showing in dotted lines the dividing screw plug and the projecting part.

Figure. 1.0 is a right side view of the-securing plug with the dividing screw plug and the projecting part removed.

Figure 11 is a side view of the projecting part of the securing plug.

Referring to the drawing:

My said new and improved brace for rivet drivingwtools comprises a main brace bar A and a supplemental brace bar E, Figs. 1 and 8. On the brace bar A, Figs. 1 and 3 is mounted a sliding collar B which supports a brace C for the rivet riving tool D.

The tool brace C is movably mounted on the collar B by means of bar l, Figs. 1, 2, 3, a and passing through a hole in the collar B. The downward movement of the brace C is limited by the cap 2 on the bar l. The

outer end of the brace C, Figs. 1, 2, 3, at, and

5 is in the form of a broken ring with the inner faces 1onnng at an acute angle.

The aperture Y in the ring, Figs. 1 and 2 is of slightly greater width than the width of the shaft of the rivet driving tool D. The under face 3, Figs. 3. l and 5 of this ring is concave and in a uniform curve of the arc of a circle having a radius equal to the distance from the top of the finished rivet tothe face 3 when the brace C is in lowered position so as to permit the rivet driving tool I), Fig. 3

to. be oscillated laterally with the top of the rivet as a center. The driving toOl D, Figs. 3. and. 6, is provided with a brace collar l in movably mounted thereon whose upper face concentric with the under face 3 of the brace C. The collar etis fixed on the tool at such a distance from the end thereofthat the faces 3 and 5 abut when the brace C is in lowered position and the end of the tool is abutting against the head of the finished rivet, and the major portions of such faces will continue to abut throughout the limit of lateral motion of the tool D. The upper inner face 6, Figs. 2, 3, 1- and 5 of the ring on the brace is circular and at such an angle to the face 3 that it will be parallel to the sides of the shaft of the tooll) when the latter is at the limit of its motion.

T he brace C is provided with a strei'igthening part 7, Figs. 2, 3, 4i. and 5, the inner face 8 of which, Figs. and abuts against the outer surface of the collar B. The part 7 serves to strengthen the brace C and to distribute the force of the blows of the rivet driving tool. I

Loosely pivoted upon the end of the collar B by the bolt 9, Figs. 23, and i the cam part G having an egg or ovoidal shaped perimeter, the horizontal diameter of which in the normal position is greater than the vertical diameter by slightly more than the height of the undriven rivet above the material to be riveted. The upper face of the part Gr abuts 'ag g'ainst the under face of a horizontal projection -l1 on the collar B, Figs. 2, 3 and 4:. The under face of the cam part G abuts against the upper face 12 of he brace C, Fig 2, 3 and i. Attached to the cam part G, Figs. 2, 3 and 4: is a lever 13, which held in a vertical position when the cam part is in a normal position. hen the lever 13, Fig. 4 is moved to the left and downward (as shown in dotted lines) the cam partG is rotated on the pivot 9 and this rotation brings into contact with the face 12 of the brace C portions of the lower face of the min part G which are continuously further and further removed from the pivot 9 and thus the brace C is forced downward until the point it, Fig. l on the end of the cam part G is reached The movement of the brace C is such length that it will have reached its lowest point when the length of the rivet has been decreased to such a stage that the head of the rivet is ready for finishing off and it is then desirable to provide for the lateral movement of the tool D for performing this process. During this movement. the lever 13 has been moved to its lowere-d position and consequently will not be in a position to interfere with the free lateral movement of the tool D,

The brace C and the cam part G are loosely secured together by the slotted bar 15, Figs. 2, 8 and 4. The bar 15 is secured to the cam part G by the bolt 16 moving in the slot 17, Fig. 4, and to the brace C by the bolt 18. As the cam part G is rotated, the bar 15 is moved to the right and the varia tion in the distance between the bolts 1.6 and 18 is permitted by reason of the bolt 16 moving in the slot 17. hen the lever 13 and the cam part G- are raised the bar 15 'aises the brace C and the brace C with the tool D is ready to be moved into position to perform the operation of driving another rivet.

The ends of the brace bars A and E are curved dowi'iwar'd, Fig. 8, so as to elevate the main portions of such bars to a suitable distance above the rivets to be driven and the material to be riveted together. The

bars A and E are loosely held together, Figs.

and lower surfaces of the collar Fare con' nected by posts 19, 20, 21 and 22. The posts 19 and 20 are closer together than 21 and 22 so that while thebar A may be turned at an angle to the bar F it is permitted practically no lateral movement. The bar E is provided with a slot 10 in which the adjustable plug H may slide-back and forth until the same is directly over a convenient rivet hole when it is firmly secured in place. The brace bar A is provided with a like slot at each end 80 and 32 which serve a like purpose. When the brace bars are in-the desired position relative to each other they are secured in position by tightening the set screw-23, Figs. 1 and 8. g

The brace bars A and E are secured to the material to be riveted by means of adjustable plugs H, H which are inserted in the empty rivet holes or convenient apertures in the material. One end of either brace bar may be provided for convenience with a curved projection'24t, Figs. 1 and 8, which may be inserted into a convenient rivet hole or aperture, or it may be provided with a similar adjustable plug H.

The adjustable plugs H, H, are inserted in the curved ends of the brace bar A. at such equal distances from the body of the bar that a straight line may be drawn parallel to the body'of the bar through their centers and the center of the broken ring of the brace C, which is of such dimensions that its center will be directly over the center ofthe rivet to be driven; In practice, when riveting," on flat horizontal surfaces, it may be found convenient to use only the brace bar A and to omit the plugs H, H, in which case the bar will be held firmly against the material to be riveted together by heavy metal weights which fit over the ends of the bar at the points where the plugs H, H are normally inserted. Such weights will be provided on their under surface with a short projecting part which will project into and through the slots 30 and 32 into convenient rivet holes so as to hold the weights in place and prevent their movement through the vibration of the riveting tool.

The shaft 25, Figs. 9. and 1.0 of the adjustable plug H is provided at its lower end with a side projectioi126, Figs. 9 and 10, slightly less in thickness thanjthe width of a" rivet hole in which a rivet of the kind to be driven is to be inserted. Inserted in a slot 27, Figs. 9 and 10, in the shaft of the plug H is a movable projecting part 28,

Figs. 9 and 11, which is pivoted on the bolt 29 to the shaft 25. The shaft 25 is provided with a central threaded cavity, Figs. 9 and 10, into which is screwed a threaded spreader plunger 31, Fig. 9. .The inner face of the projection part 28 is threaded and projects into the bottom of the threaded cavity against which threaded face the lower or inclined threaded portion of the spreader In operation the shaft plunger 31 abuts. of the plug H is inserted into the rivet hole until the projection 26 protrudes beyond the outer surface of the material to be riveted. When the plunger 31 is screwed down the threaded portion of the part 28 is forced outward and as it abuts against the side of the rivet hole it forces the projection 26 be neath the surface of the material to be riveted and when all the plugs are adjusted the entire device is screwed firmly in place. When the plunger 31 is unscrewed the part 28 is released and the plug H may be withdrawn When all of the plugs have been withdrawn the entiredevice is released from the material.

The operation of my improved lu'ace for rivet driving tools is as follows: The brace bars are secured in place by inserting the adjustable plugs H, H, into convenient rivet holes, screwing down the spreader plunger 31 and thus locking the plugs in position. The set screw 23 is now tightened, screwing the brace bars A and E firmly together. Since rivet holes are usually in straight lines and the plugs and the center of the rivet driving tool brace are equidistant from the main partof the bar the rivet driving tool when in place will be directly above the rivet to be driven. The riveting tool is usually, though not necessarily held in the right hand. inserted into the brace C by passing the shaftof the tool through. the aperture Y in the ring, raising the tool until the brace on the tool abuts against the under surface of the ring 3. The tool is now ready for operation". The lever, 1?. usually, though not necessarily held in the left hand. now pulled toward the operator and downward until. the brace C, carrying the tool, is forced downward by the ,iressure of the curved face of the cam part G against it, to a position in contact with the head of the rivet. As the rivet is hammered down the brace C is de pressed so to lteep the rivet tool in proper contact with the rivet. When the rivet has been hammered down sufiiciently and it desired to shape it into an. ap iropriate head the handle of the tool is moved backward. forward and around. The brace on the tool and the under face of the brace C being concentric, substantially equal contact is maintained and a solid brace provided at whatever angle the tool is held. In this way. the head of the rivet may be tapered off to the desired angle. When the head of back-pressure securingdisk and retain the same in a universally rockable inanner; a brace-bar slidably supporting the movable support thereon; means carried by the brace-bar for removably securing the same to the stock to be riveted by reaction with holes therein; and manually controlled mechanism for positively forcing the movable tool-support gradually toward the rivet as the same is gradually shortened in the process of heading.

8. In a device of the class described. a support for rivet-driving or heading-tools comprising a brace-bar; means for removably and temporarily securing the brace-bar at each end directly to the stock to be rivcted by coaction with holes formed in and thru such stock; a tool-support moyably supported by the brace-bar between the se curing ends adapted to support the tool in universally rockable position; and manually controlled. mechanism for positively gradually forcing the tool-support toward the stock as the rivet is shortened in the process of heading.

9. In a device of the class described, the combination with a brace-bar, of means for removably and temporarily securing the same directly to the stock to be riveted, comprising lug-bolts adapted to pass thru holes formed in and thru the stock and secured against displacement when in position by locking wedge-members which lug-bolts are adapted to be attached to the brace-bar adjacent to its ends: a tool-support slidingly supported by the brace-bar adapted to support the tool in a universally rockable manner against back-pressure; and mechanism carried by the tool-support manually controlled, adapted to gradually and positively force the tool-support toward the stool: being riveted. as the rivet is gradually shortened in the process of heading.

10. In device of the class described, the combination with a brace-bar of means for removably securing the same directly to the stock to be riveted comprising lug-bolts adapted to pass thru holes formed in and thru the stock and secured against displacement When in position by locking Wedgemembers, which lug-bolts are adapted to be attached to the brace-bar adjacent to its ends; and a tool-support slidingly mounted upon thebrace-bar adapted to support the tool in a. universally roclrable manner against back-pressure.

JAMES A. TAYLOR. 

